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1. Before You Begin Notice to Customer 2. Models Thank you very much for purchasing our PATLITE products. 3. Contents ● Request the installation and wiring be performed by a professional contractor if construction work is involved. ● Prior to installation, read this manual thoroughly 4.
Wireless Control Unit Table of Contents 1. Before You Begin ________________________________ 5 1.1. About Safety Symbols ………………………………………………………………………………… 5 1.2. Safety Precautions ……………………………………………………………………………………… 6 1.3. About Radio Law ……………………………………………………………………………………… 8 1.4. Trademarks ……………………………………………………………………………………………… 8 2. Models _____________________________________ 9 2.1. Transmitter ……………………………………………………………………………………………… 9 2.2.
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Wireless Control Unit 7.4. Functions …………………………………………………………………………………………………26 7.4.1. Level Mode ……………………………………………………………………………………………… 26 7.4.2. One-shot Mode ………………………………………………………………………………………… 27 7.4.2.1. One-shot Output Clear …………………………………………………………………………… 28 7.4.3. Input Logic A/B Switching Setting …………………………………………………………………… 29 7.5. Pairing ……………………………………………………………………………………………………30 7.5.1. How to Set Pairing ……………………………………………………………………………………… 31 7.6.
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Wireless Control Unit 7.12.2.3. LED Display Board ………………………………………………………………………………… 67 7.12.2.4. Network Products ………………………………………………………………………………… 68 7.12.2.5. Signal Light / Revolving Light …………………………………………………………………… 69 7.12.2.6. Signal Tower ……………………………………………………………………………………… 72 7.13. How to Attach and Detach Additional Units ………………………………………………………73 7.13.1. Attaching the LED Unit and Buzzer Unit …………………………………………………………… 74 7.13.2.
Wireless Control Unit 1. Before You Begin 1. Before You Begin 1.1. About Safety Symbols To prevent injuries to the user and other personnel, as well as to prevent damage to assets, note the following: ● The following symbols classify warnings and cautions, and describe the level of harm and dam- age that will occur when the corresponding instructions are ignored.
● If an unusual condition occurs while using this product, such as the emission of smoke, heat, abnormal odors, or unusual sounds, stop the application, disconnect the power, and contact your nearest PATLITE Sales Representative. Mandatory ● To prevent injuries and property damage that could result from product failure or malfunction, ensure sufficient safety by using this product together with other equipment.
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Wireless Control Unit 1. Before You Begin CAUTION ● Do not install this product near other electrical appliances. If you install this product near a facsimile, personal computer, television, microwave oven, or equipment using a motor, this product may not operate properly.
Wireless Control Unit 1. Before You Begin 1.3. About Radio Law This product incorporates radio equipment whose design has been certified as a radio station for low-power data communication systems based on the Radio Law. Follow the points below when in use. •...
Wireless Control Unit 2. Models 2. Models 2.1. Transmitter Model Wireless Type Transmitter / Receiver Model Number Bluetooth Low Energy Transmitter * Bluetooth ver.5.0 LE Coded 2.2. Receiver Model Wireless Type Transmitter / Receiver LED Unit ↓ Model Number (empty) Bluetooth Low Energy Receiver LED Unit not included...
Wireless Control Unit 4. Part Names and Dimensions 4. Part Names and Dimensions 4.1. Transmitter ■ Main Unit ■ WIO Body Unit Function DIP Group ID DIP Head Cover Switch Switch Top Case Reset Button (Reboot Main Unit) WIO Body Unit Top view Indicator Guide mark...
Wireless Control Unit 5. Product Overview 5. Product Overview 5.1. Product Configuration • This product consists of a transmitter and a receiver. • Send signals from the transmitter to the receiver/repeater via Bluetooth Ⓡ to operate revolving lights, signal towers, sound and voice annunciator, and so on connected to the receiver/repeater.
Wireless Control Unit 5. Product Overview 5.2. Specifications • The transmitter has 7 inputs and the receiver/repeater has 5 transistor outputs and 1 relay output. • You can attach additional units (LED units and buzzer unit) to this product. For information on how to install additional units, refer to "7.13. How to Attach and Detach Additional Units" ( ☞ page 73). CAUTION When LED and buzzer units are attached, operate with an input voltage from 21.6 to 26.4 VDC.
Wireless Control Unit 5. Product Overview 5.3. Operation This product works in conjunction with the following. Transmitter Receiver / Repeater Bluetooth wireless Answerback When the input information of the transmitter is successfully sent to the receiver, it lights up in light blue for 1 second.
Wireless Control Unit 6. For Proper Use of This Product 6. For Proper Use of This Product 6.1. About the BLE Wireless Communication This product uses the short-range wireless communication standard Bluetooth Low Energy (2.4 GHz bandwidth wireless). Since this is the same 2.4 GHz band as a wireless LAN and other wireless devices, interference may occur when used within the same area, but since the communication methods are different, they can coexist.
Wireless Control Unit 6. For Proper Use of This Product 6.3. Communication Distance The recommended maximum distance between products in the installation is 100 m. However, the spacing distance varies depending on obstructions between products or the type of obstruction. Some installation environments may result in significantly shorter spacing distances, so be sure to refer to "6.4. Radio Influence and Interference in Installation Environments"...
Wireless Control Unit 6. For Proper Use of This Product 6.4. Radio Influence and Interference in Installation Environments Check the following installation conditions, as they may significantly shorten the spacing distance. • When there is an obstacle (metal objects such as steel plates, wire mesh, or other noise-generating devices such as concrete walls or welding machines) between the products •...
Wireless Control Unit 7. Operation 7. Operation 7.1. Procedure up to Operation • Please familiarize yourself with "6. For Proper Use of This Product" ( ☞ page 16) before operating this product. • This section describes the procedure required to start operating this product. Follow the steps below to prepare operating this product.
Wireless Control Unit 7. Operation 7.2. About the DIP Switches and Reset Button This product has DIP switches and a reset button on the top of the WIO body unit. When setting up, turn the head cover counterclockwise to remove it, and then apply the settings. Head Cover Group ID DIP Switch Function DIP Switch...
Wireless Control Unit 7. Operation 7.2.2. Handling DIP Switches and Reset Button When setting the DIP switches and reset button, please set with following in mind. Failure to follow this instruction could result in product failure due to product damage, a deformed frame, or touching of the contacts.
Wireless Control Unit 7. Operation 7.3. Setting 7.3.1. Group ID Setting • Set when operating this product with multiple group IDs. • This product can operate up to 8 groups in the same area. • Turning on multiple products in the same area at the same time and attempting to pair them may result in unintended pairing between products.
Wireless Control Unit 7. Operation 7.3.1.1. How to Set the Group ID • Set up both transmitting and receiving products. • Read "7.2. About the DIP Switches and Reset Button" ( ☞ page 20) before handling the Group ID DIP Switch. ❶...
Wireless Control Unit 7. Operation 7.3.2. Function Settings This product has "Level Mode," "One-shot Mode", and "input logic switching" functions. Assign functions by turning this product’s Function DIP switch ON and OFF. For details on how to set functions, refer to "7.3.2.1. How to Set Functions". Point ●...
Wireless Control Unit 7. Operation 7.3.2.2. List of Functions for the Function DIP Switch (Transmitter) Switch Number Function Name Operation Description OFF: Disabled (factory default) Switch for unpairing. Unpairing ON: Execute unpairing Do not use when operating. Specify whether the input is detected at Level Mode / OFF: Level Mode (factory default) level (input ON or OFF) or at one-shot (rising...
Wireless Control Unit 7. Operation 7.4. Functions 7.4.1. Level Mode • The ON/OFF output of the receiver or repeater can be linked to the ON/OFF input of the transmitter. • Read "7.2. About the DIP Switches and Reset Button" ( ☞ page 20) before handling the DIP switches. Transmitter Function ON Input...
Wireless Control Unit 7. Operation 7.4.2. One-shot Mode • This product can hold the output of the receiving product (hold output/output for 12 seconds) by pressing the ON input when the transmitting product is emitting the OFF input. • The output hold time can be set (hold output/output for 12 seconds) by the receiver's One-shot Mode output time setting. •...
Wireless Control Unit 7. Operation 7.4.2.1. One-shot Output Clear • When operating in One-shot Mode, the output continuous state can be canceled by the receiving product. • To cancel the output continuous state, execute Clear Input (OFF→ON) to the receiver or repeater that is maintaining the output.
Wireless Control Unit 7. Operation 7.4.3. Input Logic A/B Switching Setting • Select for this product the logical sum of the transmitter product's ON/OFF input and the receiver product's ON/OFF output [Input Logic A (NO Contact)], and the inverse logic of the transmitter product's ON/OFF input and the receiver product's ON/OFF output [Input Logic B (NC Contact)].
Wireless Control Unit 7. Operation 7.5. Pairing • For the pairing procedure of this product, pair the transmitting product with the receiving product in the order of the Pairing, 1 to 4, as shown in the figure below. • Pairing of this product refers to the state in which all devices (transmitter, receiver, and repeater) can connect to each other via Bluetooth.
Wireless Control Unit 7. Operation CAUTION When pairing multiple products at the same time, use separate group IDs. Failure to follow the instruction may result in unintended pairing or failure to pair between products. If pairing between products is unintended, please unpair and pair again. (Refer to "7.6.
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Wireless Control Unit 7. Operation ● How to Pair the Receiving Product ❻ - Receiving product - Head Cover ❼ Confirm the receiving product is turned off. ❼ Remove the head cover from the WIO body unit. ❽ ❾ ❽ Group ID DIP Switch Set the Group ID DIP Switch.
Wireless Control Unit 7. Operation 7.6. How to Unpairing • To delete the connection information (pairing information) registered for each product, such as adding/removing a repeater or replacing the product for maintenance, cancel the pairing and then pairing again. • Read "7.2. About the DIP Switches and Reset Button" ( ☞ page 20) before handling the DIP switches. •...
Wireless Control Unit 7. Operation 7.7. Using a Repeater • If the wireless quality is poor due to distance or obstacles between products, the wireless quality may be improved by installing a repeater. • This product can be used as a repeater by changing the receiver settings. •...
Wireless Control Unit 7. Operation 7.7.2. When Using Repeaters from Temporary Installation • When using repeaters from when installation was performed, turn on the power from the transmitter, in turn, and pair as follows. • For products that are not paired, turn off the power. Transmitter Repeater Repeater...
Wireless Control Unit 7. Operation 7.7.3.1. How to Add a Repeater • When the indicator light is amber, a repeater can be added between products simply by turning on the repeater to be added (simple add function). • Read "7.2. About the DIP Switches and Reset Button" ( ☞ page 20) before handling the Repeater Setting Switch. •...
Wireless Control Unit 7. Operation 7.8. Checking the Indicator Check the indicator status with its lighting. Transmitter Repeater Repeater Repeater Receiver Products Indicator Category Status Contents Light Status Transmitter Repeater Receiver Starting up Lemon light on Starting up After turning ON the power, in the start up state. ●...
Wireless Control Unit 7. Operation 7.8.1. Indicator Display Examples 7.8.1.1. From Power-on to Start of Operation ● Before pairing (factory default and after unpairing) ① When using a transmitter, receiver, and repeater (3 units) Repeater 2 Repeater 3 Transmitter Repeater 1 Receiver Pairing 1 Pairing 2...
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Wireless Control Unit 7. Operation ② When using a transmitter and receiver * Depending on the installation environment and radio wave conditions, the lighting and flashing status of the indicator may not transition as shown in the figure. Transmitter Receiver Pairing Explanatory notes Power on...
Wireless Control Unit 7. Operation 7.8.1.2. Wireless Quality under Operational Conditions ● When wireless quality is good Green light on Green light on Green light on Green light on Green light on Transmitter Repeater Repeater Repeater Receiver ● When wireless quality is poor Green light on Green light on Amber light on...
Wireless Control Unit 7. Operation 7.9. Answerback A light blue indicator light for 1 second confirms that input information from the transmitter has successfully transmitted to the receiver and that the output device has been operated on. Normal operation Flashing green Flashing green Flashing green (for 2 seconds)
Wireless Control Unit 7. Operation 7.10. Mounting 7.10.1 Direct Mounting The mounting method for the transmitter and receiver are the same. ❶ Head Cover In the mounting location, drill holes for mounting and wiring the product. WIO Body Unit ❷ The top case and bottom case Rotate the WIO body unit counterclockwise...
Wireless Control Unit 7. Operation 7.10.2. Mounting with Mounting Bracket (Option) ❶ Determine how to secure the mounting bracket. When securing with screws When securing with adhesive sheet As shown in the illustration below, drill mounting holes at the installation location. Peel away the yellow non-stick paper from the adhesive sheet and stick it to the location for the adhesive sheet.
Wireless Control Unit 7. Operation 7.10.3. Mounting with Pole (Option) The following is an example installation using two circular brackets (SZP-003W: option) and Pole N. ❶ Head Cover Rotate the WIO body unit counterclockwise and detach from the direct mount bracket. WIO Body Unit •...
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Wireless Control Unit 7. Operation CAUTION Do not remove the waterproof gasket attached to the direct mount bracket. (Install together with the waterproof packing of the circular bracket) Installation using other than the supplied accessories is not warranted.
Wireless Control Unit 7. Operation 7.11. Wiring 7.11.1. Detaching the Terminal Block Connector To remove the terminal block, turn the terminal block connector screws (2 places) counterclockwise and pull out the terminal block connector. To install the terminal block, line up the guide marks on the WIO body unit and terminal block connector, and follow the removal procedure in reverse order to install.
Wireless Control Unit 7. Operation 7.11.3. Wiring the Terminal Block Connector • Lead wires are not included with this product. Please provide your own. • Follow the steps below to wire the terminal block connector. WARNING Before any work is done, disconnect the power. Be sure wiring is carried out correctly.
Wireless Control Unit 7. Operation 7.11.4. Terminal Block Connector Pin Arrangement 7.11.4.1. Transmitter Item ① Power supply *1 Connected internally with No. ⑧ Guide mark ② Power supply (COM) *2 Connected internally with No. ⑨ and ⑫ ③ Input CH1 / LED Red ④...
Wireless Control Unit 7. Operation 7.11.5.2. Receiver ● No-voltage contact output (NPN open collector) Photocoupler ③ Output: CH1 Zener Diode ④ Output: CH2 Fuse ⑤ Output: CH3 ⑥ Output: CH4 ⑦ Output: CH5 ⑩ COM CAUTION The output terminal is an NPN open collector output. For connection, use a product with the specification that it can be driven by an NPN transistor.
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Wireless Control Unit 7. Operation ● Relay output Relay ⑬ Output: CH6⊕ ⑭ Output: CH6⊖ CAUTION Relays have an open/close life. (Open/close life: 100,000 times or more *30 VDC, 3.0 A, resistive load open/close) Open/close life depends on the type of load, voltage, current, open/close quality, ambient atmosphere, and other factors. When connecting a load with a high inrush current, it is recommended to provide a protection circuit to reduce its effect.
Do not use the product beyond the ratings in the product specifications. Do not use the AC adapter to operate any product other than the WIO series and PATLITE products for which the AC adapter is recommended.
Wireless Control Unit 7. Operation 7.11.6.2. How to Use the AC Adapter ❶ ❸ Connect the extension cable lead wires to the power input terminal of this product. Fit A and B together. Push the AC plug in from above while pulling the C section.
Wireless Control Unit 7. Operation 7.12. Wiring Example This section describes wiring examples for input and output devices. Wiring information can also be viewed from the QR code on the bottom of the WIO body unit. WIO Body WIO Body Unit Bottom Unit Direct Mount Bracket...
Wireless Control Unit 7. Operation 7.12.1. Wiring Example for Input Devices 7.12.1.1. Typical Wiring Example Wiring example for each type of external contact. If you have any questions about a special application for this product, please contact our Technical Support Center listed on our website.
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Wireless Control Unit 7. Operation ● External contact classification: PLC (NPN transistor) Flashing/Buzzer External Contact Do not apply voltage to any wire other than the power. ⑭ Flashing COM Transmitter Input CH1 / LED Red ③ Input CH2 / LED Amber ④...
Wireless Control Unit 7. Operation 7.12.1.2. Signal Tower ● NE-M1ATB-M (touch sensor output) Connect 1:1 with the terminal you want to control Transmitter Input CH1 / LED Red ③ Touch Sensor Output (Lead Wire: Pink) Input CH2 / LED Amber ④...
Wireless Control Unit 7. Operation 7.12.1.4. Network Products ● NBM-D88 Connect 1:1 with the terminal Transmitter Signal Output you want to control Terminal Block DO1 ⊕ Input CH1 / LED Red ③ DO1 ⊖ DO2 ⊕ Input CH2 / LED Amber ④...
Wireless Control Unit 7. Operation 7.12.2. Wiring Example for Output Devices 7.12.2.1. Typical Wiring Example If you have any questions about a special application for this product, please contact our Technical Support Center listed on our website. Accidental wiring will result in product failure. Non-Voltage Contact Output Receiver / Repeater ③...
Wireless Control Unit 7. Operation 7.12.2.2. Sound and Audio Equipment ● BD-24A, BDV-15JF Connect 1:1 with the terminal you want to control Receiver / Repeater ③ Output: CH1 Output: CH2 ④ ⑤ Output: CH3 Output: CH4 ⑥ Output: CH5 ⑦ ⑩...
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Wireless Control Unit 7. Operation ● BKV-31JF Connect 1:1 with the terminal you want to control Receiver / Repeater ③ Output: CH1 Output: CH2 ④ ⑤ Output: CH3 Output: CH4 ⑥ ⑦ Output: CH5 STOP *Do not connect the BUSY terminal BUSY ⊕* to the receiver BUSY ⊖*...
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Wireless Control Unit 7. Operation ● EHS-M1, EHV-M1 Connect 1:1 with the terminal you want to control Receiver / Repeater ③ Output: CH1 CH1 (Lead Wire: Cyan) Output: CH2 ④ CH2 (Lead Wire: Yellow) Output: CH3 ⑤ CH3 (Lead Wire: Pink) ⑥...
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Wireless Control Unit 7. Operation ● RFV-24F Connect 1:1 with the terminal you want to control Receiver / Repeater ③ Output: CH1 Revolving Light (Lead Wire: Red) Output: CH2 ④ CH1 (Lead Wire: Cyan) Output: CH3 ⑤ CH2 (Lead Wire: Yellow) ⑥...
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Wireless Control Unit 7. Operation ● RT-24VF Connect 1:1 with the terminal you want to control Receiver / Repeater ③ Output: CH1 Revolving Light (Lead Wire: Red) Output: CH2 ④ CH1 (Lead Wire: Cyan) ⑤ Output: CH3 CH2 (Lead Wire: Yellow) ⑥...
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Wireless Control Unit 7. Operation ● LKEH-02F * The COM terminal of the receiver/repeater can be Receiver / Repeater ⑩ COM (Output for CH1-5) Common Line (Lead Wire: Yellow) connected to the flashing enable common line. Flashing Enable Common (Lead Wire: Brown)* Connect 1:1 with the terminal you want to control ③...
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Wireless Control Unit 7. Operation ● LKEH-02FV *1 The COM terminal of the receiver/repeater can be Receiver / Repeater COM (Output for CH1-5) ⑩ Common Line (Lead Wire: Yellow) connected to the flashing enable common line. Flashing Enable Common (Lead Wire: Brown)*1 Connect 1:1 with the terminal you want to control ③...
Wireless Control Unit 7. Operation 7.12.2.3. LED Display Board ● VM96F Connect 1:1 with the terminal Signal Input Receiver / Repeater you want to control Terminal Block ③ Output: CH1 ⑭ Output: CH2 ④ ⑮ ⑤ Output: CH3 ⑯ ⑥ Output: CH4 ⑰...
Wireless Control Unit 7. Operation 7.12.2.4. Network Products ● NBM-D88 Connect 1:1 with the terminal Signal Input Receiver / Repeater you want to control Terminal Block ③ Output: CH1 DI1 ⊕ DI1 ⊖ DI2 ⊕ Output: CH2 ④ DI2 ⊖ Output: CH3 ⑤...
Wireless Control Unit 7. Operation 7.12.2.5. Signal Light / Revolving Light ● RLR-M1 Receiver / Repeater ③ Output: CH1 Output: CH2 ④ Output: CH3 ⑤ Do not connect to CH1 - 5 output or to COM terminals Output: CH4 ⑥ Output: CH5 ⑦...
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Wireless Control Unit 7. Operation ● SF-M1, SL-M1 Connect 1:1 with the terminal you want to control Receiver / Repeater ③ CH1 (Lead Wire: Green) Output: CH1 CH2 (Lead Wire: Blue) Output: CH2 ④ SF-M1, SL-M1 (DC model) ⑤ Output: CH3 Output: CH4 ⑥...
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Wireless Control Unit 7. Operation ● NE-24A Connect 1:1 with the terminal you want to control Receiver / Repeater ③ Power Terminal*2 Output: CH1 Output: CH2 ④ ⑤ Output: CH3 Output: CH4 ⑥ Output: CH5 ⑦ NE-24A COM (Output for CH1 - 5)*1 ⑩...
Wireless Control Unit 7. Operation 7.12.2.6. Signal Tower ● LA6-D Connect 1:1 with the terminal Signal Input Terminal Block Receiver / Repeater you want to control ③ ① LED Tier 1 / Input 1 (Lead Wire: Red) Output: CH1 ② Output: CH2 ④...
Wireless Control Unit 7. Operation 7.13. How to Attach and Detach Additional Units When attaching or detaching additional units (LED unit, Buzzer unit) to this product, be sure to follow the steps below. CAUTION The maximum number of attachments for each unit: 1 x this product + 5 x LED units + 1 x buzzer unit. Do not attach units beyond that.
Wireless Control Unit 7. Operation 7.13.1. Attaching the LED Unit and Buzzer Unit CAUTION Attach or detach units one at a time. Buzzer Unit Buzzer Unit Unit Unit Install one unit Install one unit at a time at a time Body Unit Body Unit Direct Mount...
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Wireless Control Unit 7. Operation CAUTION If additional unit does not attach properly to this product, confirm the tab of the cylinder-shaped part at the top of unit is fitted correctly into the groove. Additionally, depending on how it is detached, the tab may come out of the groove when detaching the additional unit from this product.
Wireless Control Unit 8. System Configuration Example 8. System Configuration Example 8.1. Status Notification The receiver can report the status of equipment with outputs. Cable Cable Transmitter Repeater / Receiver Equipment Alarm ● Configuration example Component Quantity Transmitter 1 unit Receiver 1 unit Repeater...
Wireless Control Unit 8. System Configuration Example 8.2. Collective Andon The equipment operating status (signal lights) of each line can be centrally displayed as Andon. Cable Equipment Transmitter Repeater / Receiver Cable Equipment Transmitter Repeater / Receiver Cable Equipment Transmitter Repeater / Receiver ●...
Wireless Control Unit 8. System Configuration Example 8.3. Call the Person in Charge The system can be used to call the person in charge in the event of an abnormality. ● Call example 1 (For 12-second output in one-shot mode) Notify the office Cable Cable...
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Wireless Control Unit 8. System Configuration Example ● Call example 3 (For level mode) Notify the office Cable Cable Switch, etc. Transmitter Repeater / Receiver Revolving Light, etc. When you get to the site, turn the switch off. Stop instruction Cable Cable Transmitter...
Wireless Control Unit 9. Troubleshooting 9. Troubleshooting Receiver / Transmitter Issue Checklist Repeater Check if the product is correctly installed and the wiring ● ● is correct. Indicator does not light up. Check if wiring for the power supply is correct. ●...
Wireless Control Unit 11. Optional Parts 11. Optional Parts 11.1. Supported Units ● LED unit: LR6-E- □ , LR6-E- □ Z, LR6-E-MZ 1 each ● Buzzer unit: LR6-BW...
Wireless Control Unit 12. Specifications 12. Specifications 12.1. Transmitter Rated Voltage 12 to 24 VDC (24 VDC when LED unit or buzzer unit is installed) Operating Voltage Range 10.8 to 26.4 VDC (21.6 to 26.4 VDC when LED unit or buzzer unit is installed) Main Unit Maximum: 63 mA or less 24V DC input...
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Wireless Control Unit 12. Specifications Lever Group ID DIP Switch, Function DIP Switch, Reset Button Accessories Hexagon nut with flange (M4) x 3...
Wireless Control Unit 12. Specifications 12.2. Receiver Rated Voltage 12 to 24 VDC (24 VDC when LED unit or buzzer unit is installed) Operating Voltage Range 10.8 to 26.4 VDC (21.6 to 26.4 VDC when LED unit or buzzer unit is installed) Main Unit Maximum: 52 mA or less 24V DC input...
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Wireless Control Unit 12. Specifications Group ID DIP Switch, Function DIP Switch, Reset Button Lever Repeater Setting Switch Accessories Hexagon nut with flange (M4) x 3 *1 Our products with a recommended contact capacity of "35V DC or more" can be used only when operated within the allowable voltage range of this product (10.8 to 26.4 VDC).